I just purchased an 08 EXT along with a Predator programmer. Imagine my surprise when the computer of the Predator tells me incompatible vehicle type! The guys at Predator were none to helpful either. Who would have thought that a programmer that worked for 2006-2007 6.2L V8's wouldn't work on the exact same engine in 2008? Anyways just thought I should let you guys know so that none of you waste the money at this point on something that doesn't work.